Add charts to the resource data section of chrome://media-internals.

chrome/browser/resources/media_internals/media_internals.css

 /* Copyright (c) 2011 The Chromium Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
+h2 {
+  margin: 15px 0px 5px 0px;
+}
+
+ul, p {
+  margin: 0px;
+}
+
 .audio-stream[status='created'] {
   color: blue;
 }
 
 .audio-stream[status='closed'] {
   text-decoration: line-through;
 }
 
 .audio-stream[status='error'] {
   color: red;
 }
+
+#cache-entries ul {
+  list-style-type: none;
+}
+
+.cache-entry {
+  margin: 0px 0px 5px 0px;
+}
+
+.cache-entry footer {
+  font-size: smaller;
+  margin: 0px 0px 10px 0px;
+}
+
+.cache-entry summary {
+  text-indent: -1em;
+}